In the book of Acts you read how the Apostles attend the temple, offer rituals, prayers etc. So it is clear they are still obeying the Law.
How is it that they didn't understand modern day Christianity that the law was abolished and that sacrifices where of no use since Jesus cleared that for them? Was this not discussed with them by Jesus during his earthly life?
Example:
23 so do what we tell you. There are four men with us who have made a vow.
24 Take these men, join in their purification rites and pay their expenses, so that they can have their heads shaved. Then everyone will know there is no truth in these reports about you, but that you yourself are living in obedience to the law.
25 As for the Gentile believers, we have written to them our decision that they should abstain from food sacrificed to idols, from blood, from the meat of strangled animals and from sexual immorality.”
26 The next day Paul took the men and purified himself along with them. Then he went to the temple to give notice of the date when the days of purification would end and the offering would be made for each of them.
1 One day Peter and John were going up to the temple at the time of prayer—at three in the afternoon.
